Due to the overwelming response to the Pettit Drag Launch kit Group buy I am posting the following Info for all the people who wish to know what the kit includes and what is involved in the installation. I hope this answers all of the questions I have been receiving. The benefits far outway work put into this installation.
The kit includes the following:
(2) Control rod arms with metal bushings that replace the stock ones that parallel the wheels
(2) Diff mounts (made out of a hard plastic)to replace the liquid filled ones
(4) Upper A-arm bushings (made out of hard plastic with metal inserts) to replace the rubber ones.
I have not used the 4 A-arm bushings yet because I am so pleased with the way the car is set up now. However after driving the car for a while now, I am considering installing those as well, but I love the car even more now.
I did not have the rear end clunk noise. I can only imagine that the noise would most likely be from the Diff mounts or the a arm mounts, because these are the only components with enough play to make noise if they were worne.
The good news is that you dont have to remove the diff to do it. Just remove the exhaust, PPF, drive-shaft,and shields then the 2 main bolts that hold the diff. The diff will now swing down, (must remove the bolt that holds the e- brake cabls first). There are 4 bolts on top of the diff, remove them. the diff mount is now out. now for the fun part. You have to remove the liquid filled mounts. I destroyed mine, I heated the part with map gas to loosen the bushings (the rubber caught on fire) so then I just melted them out then used a screwdriver to remove a ring on the inside. once that is out you can use an all metal chisle to bang out the rest I found the 1/4 in. chisel from Sears worked best. once you have the stock liquid filled bushing out all you have to do is tap the plastic bushings in with a rubber mallet. Mine did not come with any directions so you can benefit from my hardship. The diff mounts come in two halves and bang in from either side (so each bushing is comprised of two pieces). They are two different thicknesses. The thicker ones go to the outsides of the diff hanger and the thin ones go to the inside. When I installed mine I didn't notice the diference. What a ***** it is to remove them once they are in, so learn from my mistake!!!! If you do not wish to ruin your liquid filled mount for fear you may not like the way the car is then, I suggest you buy a diff mount from the dealer & put the Pettit bushings in it and just switch the mounts (much easier). However, I do not know what that part costs. (knowing I know it sounds involved but it is very easy especialy if you follow my directions, (I wish I had these directions when I did it).
The control rod arms that parallel the wheels are very easy and straight forward to install so I will not bother taking up any more space to write about them.
Please note that I have a touring suspension, your results may be different on the R1 & R2 but my car feels like an R1 now. This mod has been the best thing I have done to my car and my car is heavily modified except the suspension. It is so different from what I was used to. Last year my 60' times at the track were like 2.6 because of the major wheel hop. most often I would have to let off for fear of breaking something, now watch out!!!! This wasn't the only difference though, the car is more nimble steering response is faster and the rear end follows very nicely. The car is very streatable, my car is not a trailer Queen, it is driven daily, In fact I am gonna go drive it right now!